What Is a DUNS Number?
A DUNS number (Data Universal Numbering System) is a unique 9-digit identifier assigned by Dun & Bradstreet to every business in their database. Think of it as your business's Social Security Number — but for credit purposes.
Without a DUNS number, business credit bureaus can't track your payment history. Vendors can't report your on-time payments. Lenders can't pull your business credit report. You cannot build business credit without a DUNS number.
💡 Key Fact
DUNS numbers are completely free when requested directly from Dun & Bradstreet. Any website charging you for a DUNS number is running a scam. The official application is at dnb.com.
Why You Need a DUNS Number for Business Credit
| Without DUNS | With DUNS |
|---|---|
| Net-30 vendors can't report payments | Every on-time payment builds your PAYDEX score |
| Lenders can't verify business existence | Banks and credit card issuers can pull your D&B profile |
| No business credit score exists | You have a PAYDEX score (0–100) lenders actually use |
| Personal guarantee required for everything | Strong D&B profile reduces or eliminates personal guarantee needs |
| Stuck using personal credit for inventory | Business credit cards and lines become available |
What You Need Before Applying
Don't start the DUNS application until you have all of these ready:
- Legal business name — exactly as it appears on your LLC formation documents
- EIN (Employer Identification Number) — the 9-digit number from the IRS
- Physical business address — must be a real street address, not a PO box or virtual mailbox
- Business phone number — a dedicated business line is ideal, but a cell number works
- Number of employees — be honest. "1" is perfectly fine for a solo seller.
- Business email address — professional email matching your domain (e.g., you@yourbusiness.com)
Photo by Kelly Sikkema on Unsplash
Step 1: Gather Your Business Information
Before you touch the D&B website, collect everything in one place:
- Print or screenshot your LLC formation documents from your state's Secretary of State website
- Locate your EIN confirmation letter (CP 575) from the IRS
- Confirm your registered business address — this must match exactly across all applications
- Set up a professional business email if you haven't already
- Decide on your "business start date" — use the date your LLC was officially registered
⚠️ Address Consistency Is Critical
Your business address must match exactly across your LLC registration, EIN application, DUNS application, and every vendor account. Even small differences — "Suite 100" vs "Ste 100" or "Main St" vs "Main Street" — can create duplicate profiles or rejections. Pick one format and use it everywhere.
Step 2: Visit the D&B DUNS Request Page
Navigate to the official D&B DUNS request page:
- Go to dnb.com
- Hover over "Products & Services" in the top navigation
- Select "D-U-N-S Number" or search "get a DUNS number" in the site search
- Click "Get a D-U-N-S Number"
- Select "I am a US-based business" (or your country)
Step 3: Complete the Application Form
The DUNS application asks for the following information. Here's how to answer each field correctly:
| Field | What to Enter | Common Mistake |
|---|---|---|
| Legal Business Name | Exact name on LLC docs | Using a DBA or shortened name |
| Business Address | Registered physical address | Using a PO box or UPS store |
| City, State, ZIP | Match LLC registration exactly | Typos or abbreviations |
| Business Phone | Active number you answer | Using a disconnected number |
| EIN | 9-digit IRS number | Entering SSN instead of EIN |
| Year Established | LLC registration year | Using today's date |
| Number of Employees | Actual count (1 is fine) | Inflating to look bigger |
| Business Type | LLC / Corporation | Selecting "Sole Proprietorship" |
| Industry | Closest match (e.g., Retail Trade) | Selecting unrelated industry |
Step 4: Submit and Wait for Processing
After submitting the form, D&B will process your request. Here's what to expect:
- Standard processing: 1–5 business days
- You'll receive: An email with your 9-digit DUNS number
- If delayed: D&B may call to verify your business information. Answer promptly.
✅ Pro Tip: Create a D&B Account Immediately
Once you receive your DUNS number, create a free account at dnb.com and claim your business profile. This lets you monitor your credit file, correct errors, and see which vendors have reported payments.
Step 5: Verify Your DUNS Number
Once you receive your DUNS number, verify it works:
- Go to dnb.com and search your DUNS number
- Confirm your business name, address, and EIN are correct
- Check for any duplicate profiles (common if addresses don't match exactly)
- If you find errors, submit a data correction request through D&B's online portal
Common Mistakes That Delay or Kill Your DUNS Application
❌ Mistake #1: Using a PO Box or Virtual Mailbox
D&B requires a physical street address. PO boxes, UPS stores, and virtual mailboxes will trigger manual review or rejection. Use your home address if necessary — you can update it later.
❌ Mistake #2: Applying Before Your LLC Is Active
D&B verifies your business against state records. If your LLC was filed yesterday and hasn't appeared in the Secretary of State database yet, your application may be rejected. Wait 3–5 business days after LLC formation.
❌ Mistake #3: Entering Your SSN Instead of EIN
The EIN field is for your 9-digit Employer Identification Number from the IRS — not your Social Security Number. Using your SSN defeats the entire purpose of separating business and personal credit.
❌ Mistake #4: Paying for "Expedited" Services
Third-party websites charge $50–$200 to "expedite" your DUNS number. This is a scam. D&B processes all standard requests in 1–5 business days for free. There is no legitimate expedited service.
What If Your Application Is Rejected or Delayed?
If D&B rejects your application or you don't hear back within 5 business days:
- Check your email spam folder. D&B sometimes sends verification requests that get filtered.
- Call D&B directly: 1-800-234-3867. Have your EIN and LLC documents ready.
- Verify your LLC is active on your state's Secretary of State website. If it's not showing yet, wait 3 more days and reapply.
- Check for address mismatches. If your LLC address differs from your D&B application, correct it and resubmit.
- Consider D&B CreditBuilder if you need faster profile establishment. It's a paid service ($149/year) that accelerates reporting and gives you access to your scores. Read our review →
Frequently Asked Questions
How long does it take to get a DUNS number?
1–5 business days for standard applications submitted directly through dnb.com. If D&B needs to verify your information manually, it can take up to 10 business days.
Is the DUNS number really free?
Yes. Dun & Bradstreet issues DUNS numbers at no cost when you apply directly through their website. Any third-party site charging a fee is unnecessary.
Can I get a DUNS number without an LLC?
Technically yes, but we don't recommend it. Sole proprietorships can get DUNS numbers, but they can't build true business credit because there's no legal separation between the owner and the business. Form an LLC first.
What is a PAYDEX score and when do I get one?
Your PAYDEX score is D&B's business credit rating (0–100). You won't have one immediately after getting your DUNS number. It appears after your first vendor reports a payment — typically 30–60 days after your first Net-30 purchase.
Do I need a DUNS number for every business I own?
Yes. Each legal business entity needs its own DUNS number. If you have two LLCs, you need two DUNS numbers.
Get the DUNS Setup Checklist
Don't miss a single field. Our printable checklist ensures your DUNS application is approved on the first try.
